Ralph E Taylor, James W Sennott: Navigation system and method. The United States of America represented by the Administrator of the National Aeronautics and Space Administration, John O Tresansky, John R Manning, Ronald F Sandler, April 24, 1984: US04445118 (618 worldwide citation)

In a global positioning system (GPS), such as the NAVSTAR/GPS system, wherein the position coordinates of user terminals (14) are obtained by processing multiple signals transmitted by a constellation of orbiting satellites (16), an acquisition-aiding signal generated by an earth-based control stati ...

Nicholas Kalmar: In situ recovery of oil from oil shale. Owen Wickersham & Erickson, April 24, 1984: US04444258 (250 worldwide citation)

A method for in situ recovery of oil from oil shale containing oil bearing compound. The method begins with thermally decomposing the kerogen underground to produce oil vapors, combustible gases, and carbon residue, followed by conducting the oil vapors and combustible gases to aboveground and recov ...

Mark K Malmros: Analytical device having semiconductive organic polymeric element associated with analyte-binding substance. Omri M Behr, April 24, 1984: US04444892 (238 worldwide citation)

A method, sensor and semiconductor device for determining the concentration of an analyte in a medium. The device features an element constructed of semiconductive organic polymer associated with a binding substance having specific affinity for the analyte.

Lloyd Geoffrey, Randall Carr, Donald L Carr, Rodger H Flagg: Apparatus and process for the recovery of oil. Warren H Kintzinger, April 24, 1984: US04444255 (231 worldwide citation)

A pair of electrodes is floated on the surface of the oil at the base of a oil well. An AC high frequency current is imposed across the gap in the electrodes to develop microfine carbon which serves as a catalyst for the electrolytic decomposition of petroleum by a plurality of elongated, nonspark-g ...

William F Hoffman, Robert L Smith, Alvin K Willard: Antihypercholesterolemic compounds. Merck & Co, William H Nicholson, Mario A Monaco, April 24, 1984: US04444784 (221 worldwide citation)

6(R)-[2-(8'-acyloxy-2'-methyl-6'-methyl (or hydrogen)-polyhydronaphthyl-1')-ethyl]-4 (R)-hydroxy-3,4,5,6-tetrahydro-2H-pyran-2-ones are prepared by acylation of the corresponding 8'-hydroxy compounds. The products are strong inhibitors of the biosynthesis of cholesterol.

Alvin M Marks: Device for conversion of light power to electric power. April 24, 1984: US04445050 (214 worldwide citation)

This invention relates to a high efficiency device for the direct conversion of light power to electrical power. Present photocells for accomplishing this purpose are well known to the art and have a theoretical efficiency not exceeding about 20%. In practice, realization of efficiency of about 10% ...

Terry L Foster, Raymond C Casey: Immunoassay with article having support film and immunological counterpart of analyte. Science Research Center, Kane Dalsimer Kane Sullivan and Kurucz, April 24, 1984: US04444879 (208 worldwide citation)

Methods and apparatus for immunoassays. The apparatus comprises a water-insoluble article bearing a dried film of a synthetic, polymeric resin having attached chemical groups capable of forming covalent bonds with immunoreactants. The method and apparatus may be applied to determine total immunoglob ...

Michael K Hoffmann: Process for making human antibody producing B-lymphocytes. Sloan Kettering Institute, Felfe & Lynch, April 24, 1984: US04444887 (204 worldwide citation)

Antibody producing human B-lymphocytes are produced by a process which comprises culturing human B-lymphocytes in a tissue culture medium in the presence of an antigen; helper signal producing agents comprising monocytes or monocyte conditioned medium containing Interleukin 1 (I1-1), and helper T-ly ...

Milton D Goldenberg: Tumor localization and therapy with labeled antibodies to cell surface antigens. Millen & White, April 24, 1984: US04444744 (166 worldwide citation)

Improved methods are provided for using radiolabeled antibodies to tumor cell surface antigens to locate, diagnose and stage tumors having such antigens on their cell surfaces by external photoscanning, whereby significantly increased resolution, convenience and/or efficiency of operation may be ach ...

Gene Zamba, Carl Foltz: Process for making electrosurgical scalpel pencil. Trident Surgical Corporation, Gipple & Hale, April 24, 1984: US04443935 (164 worldwide citation)

A process for making an electrosurgical pencil with rocker switch for holding and controlling a monopolar electrosurgical scalpel blade, wherein the rocker switch pivots on the exterior of the pencil body and is isolated from the interior of the body by a flexible waterproof seal. In the process for ...